CN110227917B - Assembly method of precision mechanical parts based on gap measurement - Google Patents
Assembly method of precision mechanical parts based on gap measurement Download PDFInfo
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- CN110227917B CN110227917B CN201910487052.9A CN201910487052A CN110227917B CN 110227917 B CN110227917 B CN 110227917B CN 201910487052 A CN201910487052 A CN 201910487052A CN 110227917 B CN110227917 B CN 110227917B
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- connecting ring
- precision mechanical
- shell
- head cap
- mechanical part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention relates to an assembly method of precision mechanical parts based on clearance measurement, belonging to the technical field of mechanical assembly, wherein the precision mechanical parts have a form and position tolerance of not more than 0.02mm, the method is characterized in that two precision mechanical parts subjected to clearance measurement are assembled, and the inner surface of one precision mechanical part is matched with the outer surface of the other precision mechanical part for assembly. The method comprises the steps of firstly measuring the inner diameter of a first precision mechanical part and the outer diameter of a second precision mechanical part by using a three-coordinate detector, and providing a foundation for the assembly process in the later period.
Description
Technical Field
The invention relates to an assembly method of precision mechanical parts based on clearance measurement, belonging to the technical field of mechanical assembly, wherein the precision mechanical parts have a form and position tolerance of not more than 0.02mm, the method is characterized in that two precision mechanical parts subjected to clearance measurement are assembled, and the inner surface of one precision mechanical part is matched with the outer surface of the other precision mechanical part for assembly.
Background
Because the precision mechanical parts have high dimensional accuracy and high assembly requirements, the assembly method in the prior art has the following defects:
(1) too large or too small assembling clearance of precision mechanical parts occurs;
(2) the phenomenon of uneven glue coating on the surface of a precision mechanical part occurs;
(3) the phenomenon of local glue shortage on the surface of a precision mechanical part occurs;
(4) the phenomenon of local glue leakage on the surface of a precision mechanical part occurs;
(5) the problem of incomplete assembly among precision mechanical parts occurs;
the defects easily cause the sealing performance and the binding force of the product.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art and provides the assembly method of the precision mechanical parts based on the clearance measurement.
The technical solution of the invention is as follows:
a method for assembling precision mechanical parts based on clearance measurement is characterized in that two precision mechanical parts subjected to clearance measurement are assembled, the two precision mechanical parts subjected to clearance measurement are respectively a first precision mechanical part and a second precision mechanical part, the inner surface of the first precision mechanical part is matched and assembled with the outer surface of the second precision mechanical part, and the method comprises the following steps:
(1) measuring the inner diameter D of the first precision mechanical part and the outer diameter D of the second precision mechanical part by using a composite three-coordinate detector, and selecting the first precision mechanical part and the second precision mechanical part with D-D being 0.08-0.12 mm;
(2) pretreating the inner surface of the first precision mechanical part selected in the step (1), and pretreating the outer surface of the second precision mechanical part;
(3) uniformly gluing the outer surface of the second precision mechanical part pretreated in the step (2);
(4) and (3) assembling the second precision mechanical part subjected to gluing in the step (3) into the first precision mechanical part pretreated in the step (2), detecting the torque by using a torque sensor in the assembling process, and finishing the assembling process of the first precision mechanical part and the second precision mechanical part after the torque reaches a set value.
In the step (2), the method for pretreating the inner surface of the first precision mechanical part comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing; the method for pretreating the outer surface of the second precision mechanical part comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing;
in the step (3), when the outer surface of the second precision mechanical part is uniformly coated with glue, glue solution is uniformly coated on the outer surface of the second precision mechanical part in a needle injection mode, the glue outlet of the needle is 0.5-1mm away from the outer surface of the second precision mechanical part during coating, the glue outlet rate of the needle is 0.05-0.15g/s, the second precision mechanical part is supported by a bracket, the second precision mechanical part can rotate on the bracket along the axial direction, the rotation speed of the second precision mechanical part is 5-8 r/min, when the diameter of the second precision mechanical part is less than 10mm, the rotating speed of the second precision mechanical part is 5-6 r/min, when the diameter of the second precision mechanical part is larger than 30mm, the rotating speed of the second precision mechanical part is 7-8 r/min; the viscosity of the glue solution used is 3800-;
in the step (4), the output value of the torque sensor is 1.8-2N/m when the torque sensor is used for detecting the torque, namely the set value is 1.8-2N/m.
The method for testing the sealing performance and the bonding force of the assembled combination of the first precision mechanical part and the second precision mechanical part comprises the following steps: heating the first precision mechanical part and second precision mechanical part combination in a drying box at the heating temperature of 60-70 ℃ for 25-30h, naturally cooling to room temperature, detecting the first precision mechanical part and second precision mechanical part combination by using a He mass spectrometer, and obtaining a leak-free test result, wherein the sealing performance and the bonding force of the first precision mechanical part and second precision mechanical part combination can meet the requirements according to the test result.
Advantageous effects
The method comprises the steps of firstly measuring the inner diameter of a first precision mechanical part and the outer diameter of a second precision mechanical part by using a three-coordinate detector, and providing a foundation for the assembly process in the later period.
Detailed Description
The present invention will be further described with reference to the following examples.
Examples
A method for assembling precision mechanical parts based on clearance measurement is characterized in that two precision mechanical parts, namely a connecting ring and a head cap shell, are assembled, and the inner surface of the connecting ring is matched with the outer surface of the head cap shell; the method comprises the following steps:
(1) measuring the inner diameter D of the connecting ring to be 70.05mm by using a composite three-coordinate detector, measuring the outer diameter D of the head cap shell to be 69.95mm, and selecting the connecting ring and the head cap shell to be assembled, wherein D-D is 0.10 mm;
(2) pretreating the inner surface of the connecting ring in the step (1), and pretreating the outer surface of the hood shell in the step (1);
(3) uniformly gluing the outer surface of the hood shell subjected to pretreatment in the step (2);
(4) and (3) assembling the hood shell after the glue is applied in the step (3) into the connecting ring pretreated in the step (2), detecting the torque by using a torque sensor in the assembling process, and finishing the assembling process of the connecting ring and the hood shell after the torque reaches a set value.
In the step (2), the method for pretreating the inner surface of the connecting ring comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing; the method for pretreating the outer surface of the head cover shell comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing;
in the step (3), glue solution is uniformly coated on the outer surface of the hood shell in a needle injection mode when the outer surface of the hood shell is uniformly coated with glue, the glue outlet of the needle is 0.8mm away from the outer surface of the hood shell during coating, the glue outlet rate of the needle is 0.1g/s, the hood shell is supported by a support and can axially rotate on the support, and the rotating speed of the hood shell is 8 r/min; the viscosity of the glue solution is 4000 cps;
in the step (4), the output value of the torque sensor is 2N/m when the torque sensor is used for detecting the torque, namely the set value is 2N/m.
The method for testing the sealing performance and the bonding force of the connecting ring and the head cap shell assembly after assembly comprises the following steps: heating the connecting ring and the head cap shell assembly in a drying box at 65 ℃ for 28h, naturally cooling to room temperature, detecting the connecting ring and the head cap shell assembly by using a He mass spectrometer leak detector, and obtaining a test result without leak points.
Claims (1)
1. A method for assembling precision mechanical parts based on clearance measurement is characterized in that:
assembling two precise mechanical parts of a connecting ring and a head cap shell, wherein the inner surface of the connecting ring is matched and assembled with the outer surface of the head cap shell; the method comprises the following steps:
(1) measuring the inner diameter D of the connecting ring to be 70.05mm by using a composite three-coordinate detector, measuring the outer diameter D of the head cap shell to be 69.95mm, and selecting the connecting ring and the head cap shell to be assembled, wherein D-D is 0.10 mm;
(2) pretreating the inner surface of the connecting ring in the step (1), and pretreating the outer surface of the hood shell in the step (1);
(3) uniformly gluing the outer surface of the hood shell subjected to pretreatment in the step (2);
(4) assembling the hood shell after the glue is applied in the step (3) into the connecting ring after the pretreatment in the step (2), detecting the torque by using a torque sensor in the assembling process, and completing the assembling process of the connecting ring and the hood shell when the torque reaches a set value;
in the step (2), the method for pretreating the inner surface of the connecting ring comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing; the method for pretreating the outer surface of the head cover shell comprises the following steps: washing with absolute ethyl alcohol repeatedly for more than three times, and naturally drying after washing;
in the step (3), glue solution is uniformly coated on the outer surface of the hood shell in a needle injection mode when the outer surface of the hood shell is uniformly coated with glue, the glue outlet of the needle is 0.8mm away from the outer surface of the hood shell during coating, the glue outlet rate of the needle is 0.1g/s, the hood shell is supported by a support and can axially rotate on the support, and the rotating speed of the hood shell is 8 r/min; the viscosity of the glue solution is 4000 cps;
in the step (4), the output value of the torque sensor is 2N/m when the torque sensor is used for detecting the torque, namely the set value is 2N/m;
the method for testing the sealing performance and the bonding force of the connecting ring and the head cap shell assembly after assembly comprises the following steps: heating the connecting ring and the head cap shell assembly in a drying box at 65 ℃ for 28h, naturally cooling to room temperature, detecting the connecting ring and the head cap shell assembly by using a He mass spectrometer leak detector, and obtaining a test result without leak points.
Priority Applications (1)
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| CN201910487052.9A CN110227917B (en) | 2019-06-05 | 2019-06-05 | Assembly method of precision mechanical parts based on gap measurement |
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| CN201910487052.9A CN110227917B (en) | 2019-06-05 | 2019-06-05 | Assembly method of precision mechanical parts based on gap measurement |
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| CN110227917B true CN110227917B (en) | 2021-07-13 |
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Citations (2)
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| CN104492657A (en) * | 2014-12-16 | 2015-04-08 | 马鞍山联邦智能装备有限公司 | LED lamp cap dispenser |
| CN105928764A (en) * | 2016-07-06 | 2016-09-07 | 西南交通大学 | Method for preventing seepage by glue injection to side wall of irregular undisturbed fractured rock |
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| JPH07285031A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Fitting method for shaft and object to be fitted by shrinkage fitting |
| KR100734573B1 (en) * | 2006-06-27 | 2007-07-02 | 반도코리아 주식회사 | Idler assembling method |
| CN106020147B (en) * | 2016-05-23 | 2019-06-21 | 北京理工大学 | A kind of assembly precision systematic analytic method of complex precise engineering goods |
| CN107116007A (en) * | 2017-06-20 | 2017-09-01 | 柴德维 | Rubber coating fixture for rubber component |
| CN109723729B (en) * | 2019-01-09 | 2020-04-24 | 杭州雷迪克节能科技股份有限公司 | Assembly process of special-shaped maintenance-free single-row tapered roller bearing with adhesive retainer ring |
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- 2019-06-05 CN CN201910487052.9A patent/CN110227917B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492657A (en) * | 2014-12-16 | 2015-04-08 | 马鞍山联邦智能装备有限公司 | LED lamp cap dispenser |
| CN105928764A (en) * | 2016-07-06 | 2016-09-07 | 西南交通大学 | Method for preventing seepage by glue injection to side wall of irregular undisturbed fractured rock |
Non-Patent Citations (2)
| Title |
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| 《厌氧胶在液体火箭发动机上的应用研究》;秦新华 等;《火箭推进》;20010615 * |
| 秦新华 等.《厌氧胶在液体火箭发动机上的应用研究》.《火箭推进》.2001, * |
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